问题
单项选择题
螺旋输送机的特点为( )。
A．密封性好，操作方便，但有机件易磨损，消耗功率大
B．密闭性差，易造成环境污染
C．高倾斜度可以做到直接从地面将煤送到小型锅炉的煤斗
D．间断给料均匀，可调节，结构简单，驱动功率小
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
螺旋输送机的特点为( )。
A．密封性好，操作方便，但有机件易磨损，消耗功率大
B．密闭性差，易造成环境污染
C．高倾斜度可以做到直接从地面将煤送到小型锅炉的煤斗
D．间断给料均匀，可调节，结构简单，驱动功率小
参考答案：A
| 词形变换：选择方框里的词，并用其适当形式填空，每词只用一次。 | |
2. This pen isn't yours. I think it's ______. 3. Mr. Wang is a good ______. He works on a farm. 4. How many ______ does have every day? 5. Miss Li is a ______ teacher. He teaches us Chinese. 6. He has to ______ a friend this Sunday. 7. How about ______ to have a picnic next Sunday? 8. Mr. Wang often ______ TV on Saturday evening. 9. Wanglin's mother is a doctor and his father is a ______. 10. Look! The children are ______ on the river (河). |